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Nano 20L Backpack

4.490566037735849 out of 5 stars
53 Reviews
Color:Obsidian Black


Size Chart


Nano 20L Backpack

Whether you are commuting, sneaking in a quick day hike, or enjoying a nice bike ride the Gregory Nano 20L Backpack will have you covered. This medium sized pack is well suited for all of these activities thanks to the dedicated hydration pocket, stable and comfortable padded shoulder straps, and one hand sternum strap buckle. Additionally a multitude of pockets keep you organized and ready to go at a moments notice.


  • Versatile pack that you can turn to on a daily basis
  • Durable nylon outer easily handles daily wear and tear
  • Padded shoulder straps are comfortable and stable for long hikes
  • Dedicated hydration pocket keeps you hydrated and ready to go
  • Removable hip-belt can provide additional stability when needed
  • Front stash pocket makes for quick and easy layer storage
  • Item #GRE00BG
20L (1220cu in)
Shoulder Straps
padded airmesh
Waist Belt
removable, webbing
Hydration Compatible
zippered hydration, outer stuff, zippered main, zippered front
Gear Loops
commuting, hiking
Manufacturer Warranty
limited lifetime

Overall Rating

4.5 based on 53 ratings

Review Summary

1 Stars - 0 reviews
2 Stars - 0 reviews
3 Stars - 6 reviews
4 Stars - 15 reviews
5 Stars - 32 reviews

Fits True To Size

Screen reader users: the following list provides a visual scale to illustrate the product fit. Please refer to the heading above for the fit type in text.
Runs smallTrue to sizeRuns large

What do you think about this product?


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5 out of 5 stars

March 21, 2024

Daily driver / small travel pack

I've used it several times
Size Bought:

Worked great for a ski trip to Colorado. Slim but still has 3 pockets with plenty of room. I have been using it for work now too, love this thing. It’s actually pretty water resistant and keeps all my stuff dry.

5 out of 5 stars

March 21, 2024

Perfect size for quick day trips and have even used it for a few weekend trips. Durable and lightweight. I even like the color,😀


Originally reviewed on

4 out of 5 stars

March 4, 2024

Nano 20

This is a great little back pack. It’s light and fits great. It holds enough for a day hike or any day adventure. This has been great for me because it keeps me from packing too much but allows me to pack what I need. I have used this for skiing, traveling and for work. The only downside is side is the small loop used for hydration hold the hose in place on the shoulder strap broke about 2 months after every day use. I was not even using it with a hydration pack/hose. Still I would recommend this pack.

Christopher W

Originally reviewed on

4 out of 5 stars

January 9, 2024

Good so far

Only used a couple of times for day hikes. Solid pack, no issues.

Jason G

Originally reviewed on

5 out of 5 stars

December 12, 2023

Perfect bag for anything

I am head over heels in love with the bag. I can use it for a day trip (love the option for a water bladder to slide in there), as a carry on, my gym bag, or a daily work bag. I can't find a single thing wrong with this bag. Anyone can use this bag for so many different occasions. Such a versatile bag!

Anthony B

Originally reviewed on

4 out of 5 stars

November 11, 2023

Good Size for Day HIkes

First, no issues or concerns with the quality of Gregory packs. Regarding this pack, great size for a day hike, or in my case, walking around Spain. The one fault I see is the lack of separate compartments to organize. I'm use to a Swiss Gear pack for business travel, so accustom to pocket options. The pack is comfortable and relatively small in physical size.

James J

Originally reviewed on

5 out of 5 stars

October 12, 2023

Amazing! Well worth the price.

Great quality for the affordability. Pocket for a water bladder, large pocket, then a smaller zipper pocket and smaller "snap" pocket. Two side pockets for water bottles. Works great for day hikes and/or a personal item on flights.

C Davis

Originally reviewed on Gregory

4 out of 5 stars

October 2, 2023

Better than I expected

I was hoping this was the bag I needed for short trips of a few days. I have used this now over a few months, and it's working well for me. You do have to adapt how you pack, but that's the only real caveat.

Kilburn T

Originally reviewed on

4 out of 5 stars

September 23, 2023

Good Daypack

Good daypack for the price. Lightweight. Not for heavy duty use.

Wes K

Originally reviewed on Gregory

5 out of 5 stars

September 5, 2023

Great build to it, nice pocket and bought a bladder with it. Makes for a nice day hike or biking pack for short activities.

Brandon O

Originally reviewed on